Evidence map›Paper›PMID 35420713›Full record

ArticleMovement disorders : official journal of the Movement Disorder Society2022

Functional Brain Dysconnectivity in Parkinson's Disease: A 5-Year Longitudinal Study.

Sahar Yassine, Ute Gschwandtner, Manon Auffret, Sophie Achard, Marc Verin, Peter Fuhr, Mahmoud Hassan

Abstract read
In one paragraph

Article in Movement disorders : official journal of the Movement Disorder Society, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Altered regional spontaneous brain activity in Parkinson's disease: a meta-analysis.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
    Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Review
  19. Article
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Sahar YassineUniv Rennes, Inserm, LTSI - U1099, Rennes, F-35000, France.ORCID 0000-0002-8791-3878
Ute GschwandtnerDepartment of Neurology, Hospitals of the University of Basel, Basel, Switzerland.
Manon AuffretComportement et noyaux gris centraux, EA 4712, CHU Rennes, Rennes, France.ORCID 0000-0002-7003-4084
Sophie AchardUniversity Grenoble Alpes, CNRS, Inria, Grenoble INP, LJK, 38000 Grenoble, France.
Marc VerinUniv Rennes, Inserm, LTSI - U1099, Rennes, F-35000, France.
Peter FuhrDepartment of Neurology, Hospitals of the University of Basel, Basel, Switzerland.
Mahmoud HassanMINDig, Rennes, F-35000, France.ORCID 0000-0003-0307-5086

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTracking longitudinal functional brain dysconnectivity in Parkinson's disease (PD) is a key element to decoding the underlying physiopathology and understanding PD progression.

objectivesThe objectives of this follow-up study were to explore, for the first time, the longitudinal changes in the functional brain networks of PD patients over 5 years and to associate them with their cognitive performance and the lateralization of motor symptoms.

methodsWe used a 5-year longitudinal cohort of PD patients (n = 35) who completed motor and non-motor assessments and sequent resting state (RS) high-density electroencephalography (HD-EEG) recordings at three timepoints: baseline (BL), 3 years follow-up (3YFU) and 5 years follow-up (5YFU). We assessed disruptions in frequency-dependent functional networks over the course of the disease and explored their relation to clinical symptomatology.

resultsIn contrast with HC (n = 32), PD patients showed a gradual connectivity impairment in α2 (10-13 Hz) and β (13-30 Hz) frequency bands. The deterioration in the global cognitive assessment was strongly correlated with the disconnected networks. These disconnected networks were also associated with the lateralization of motor symptoms, revealing a dominance of the right hemisphere in terms of impaired connections in the left-affected PD patients in contrast to dominance of the left hemisphere in the right-affected PD patients.

conclusionsTaken together, our findings suggest that with disease progression, dysconnectivity in the brain networks in PD can reflect the deterioration of global cognitive deficits and the lateralization of motor symptoms. RS HD-EEG may be an early biomarker of PD motor and non-motor progression. © 2022 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.

Indexed as

Parkinson DiseaseBrainElectroencephalographyFollow-Up StudiesHumansLongitudinal StudiesMagnetic Resonance Imagingelectroencephalographyfollow-up studyfunctional brain networksmovement disordersParkinson's disease

Identifiers

PMID35420713
PMCPMC9543227

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.